Use the repack manual’s to:

If you’ve run into issues with ICU 602 not responding after firmware update UPD 4.1, post your symptom + hardware revision below. I’ve seen two failure modes related to the CAN termination jumper – will elaborate in reply.

Deploy the application on a suitable platform.

Includes numeric keys (0-9) for entering line and destination codes.

Define the detailed requirements and create a wireframe of the application.

Key Contents of an Effective Manual Repack (UPD)

Ensure the vehicle’s master switch is active. The ICU 602 will perform a self-test.